Concrete column



A. H. REEVES Feb.' 2 1926. Lsiwga CONCRETE COLUMN Filed Feb. 15, 1923 WIT/VESSES AUST/N H. BV

IMQ/Z0 w V er A TTORNEYS Patented F eb. 2, 1926.

UNITED STATES AUSTIN H. REEVES, OF NEWARK, NEW' JERSEY.

CONCRETE COLUMN.

Application filed February 16,1923. Serial No. 619,470.

Be it known that I, AUSTIN H.Y REEVES, a citizeny of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented a new and Improved Concrete Column, of which the following is a full, clear, and exact description. p

This invcntion'relates to concrete structures and particularly to an improved concrete column and has for an object to provide a construction wherein the stresses on the column are distributed evenly throughout.

Another object of the invention is to provide a concrete column wherein the reinforcing members are arranged in a horizontal or substantially horizontal position.

Vin such a way as to insure the column against failure by lateral stresses.

A still further object of the invention is to make use of the total cross sectional areaV of the column available for supporting a load.

In the accompanying drawing Figure l' is a longitudinal vertical section through a column disclosing an embodiment of the invention.

-Figure 2 is a sectional view through Figure l approximately on line 2 2.

In the construction of columns heretofore, reinforcing means have been provided which were designed with the intention of assisting the concrete in supporting the load, by taking up thevcompression strain. In forming columns of the kind just mentioned, numerous vertical reinforcing structures were provided leither of a substantially built up nature or of separate vertical bars. Tests of columns thus reinforced show that for a given size column a plain concrete column supports as great a load as a column reinforced by vertical bars with lateral ties. The reason why such a reinforcedcolumn cannot support rmore load is because the introduction of thel vertical bars tends to destroy the even distribution of direct stress by localizing it around the vbe merely cut off straight.

bars. Then a column is loaded so that a certain direct compression stress is present, it has'been found by test that there is a corresponding lateral tensile stress. Y To take care of this lateral tensile. stress as well as 'to overcome certain weaknesses, mats-or spiders have been placed in the column shown in the accompanying drawing.

In this construction, a column l of concrete round in cross section hasbeen shown, though othershapes could be provided without in any way departing from the spirit of the invention. In order to provide proper reinforcements for taking care of the different Stresses in the column and particularly the lateral tensile stresses, a number of mats or spiders 2 are arranged inthe'column at suitable distances apart. groups of reinforcing members are arranged substantially as shown in Figure 2, namely, as radiating bars and reinforcing structures connected together in some desirable manner. In Figure 2, eight bars have been shown, though a greater or less number might be. used, these bars being 'connected together at .the center in any suitable manner. as for instance, by a ,ring 3 and intermediate their ends areconnected by suitable spacing and tying wires 4t and 5. The outer ends of each of the bars or radiating members G is provided with an eye. 7 or some other formation, though if desired, it could In-the accompanying drawing, radial bars have been shown but it is realized that mats may be made up of other arrangements of bars and placed in a column in a substantially horiy zontal position without departing from the spirit of the invention. The spiders or mats 2 could be dropped into position from the top with little difiiculty whenever desired.

F or instance, in building the column l, a suitable foundation or base 8 of any desired kind is provided which is preferably provided 'with anchoring bars 9 of any desired size, number and shape. These anchoring bars 9 ext-end a Short distance upwardly above the base 8 so that the lower part of the column l receives projecting portions. After the column l has been builtup a short distance, the firstV spider is dropped into position and then the column is built aup a These spaced short distance further and a second spider is provided. The superimposed or supported strueturel() may be eonneeted with the column l in any suitable manner7 as AILor instanee, by anchoringi rods ll similar to the rods E). rl`he spiders or mats 2 are pre'l'er ably comparatively numerous in the column so that all parts olf the concrete formation will be atleeted thereby and mayv transmit strains thereto heitere the strains become excessire.

lt will be noted that in this 'form ot the invention reinl'oreing arms are provided and distributed through the eouerete to readily distribute or take up the lateral tensile stresses as they are formed and betere they beeome excessive at an),v one point. The reinforcing structure ma)v he hungup first and then the eonerete poured around the same though it eould he made into sections and tittetl into position as the column is built. By arranging the spiders or mats as specified a strueture is presented whieh resists to a maximum any compressive shearing or diagonal strain as well any lateral tensile Strain.

1. A concrete column, Comprising;4 a conerete body hau/'ing` reinforcing members disposed horizontalljyT and in spaced relation to one another throughout the height ot the column, each reinforcing member consisting o'lI a ring` havingm plurality ot radial arms terminating;l in eyes-` and wires connecting the several arms together.

concrete column, comprising' a conerete bod)7 having; reinforcing members disposed luirizontally in spaced relation to one another throughout the height of the eolumn, each reinforcing member comprising :t ring haringa plurality ol radial arms and wires connecting` the arms together.

riUs'rjrNin. nuevos. 

